Scientists have discovered evidence of the zero symbol in the Indian Bakhshali manuscript, a mathematical text which was discovered in 1881. Carbon dating indicates tha the manuscript dates from as early as 3rd century, making it the world's oldest recorded origin of the zero symbol. This means that the manuscript predates a 9th-century inscription of zero on the wall of a temple in Gwalior, Madhya Pradesh, which was thought to be the oldest example of a zero.
The origin of the concept of zero or sunya has been traced an ancient Indian Bakhshali manuscript. This makes the Bakhshali manuscript world's oldest recorded origin of the zero symbol. The Bakhshali manuscript is an ancient Indian mathematical manuscript written on more than 70 leaves of birch bark, found in 1881. It is in an ancient form of Sanskrit and has been at the Oxford University since 1902.